断裂带封闭势研究及应用

断层是由一系列破裂面或次级断层组成的带,断层规模越大,断裂带也越宽且结构越复杂。这种断裂带对断层封闭性有重要影响;断裂带能否封堵油气,取决于断裂带能否在空间上形成连续的遮挡以及断裂带连通的孔隙喉道是否足够小,并能够封闭烃柱;断裂带封闭势的值越大,越有利于断层封闭。东辛油田营1断块营32断层由北向南、从沙二段第1砂层(Es21)到第11砂层(Es211)断裂带封闭势逐渐减小,反映了营32断层北部封闭性好于南部,上部封闭性好于下部。这说明了同一条断层封闭的差异性及动态性。

Study and application of faulted zone sealing potential

ults are a belt consisted of a series of fracture surface or secondary faults. The bigger the fault scale is, the wider the fault zone is and the more complex their structure is. The fault zone influences fault sealing property greatly. Whether the fault zone seals oil and gas, it depends on whether it can form the consecutive barrier in space as well as whether the pore throat connected with fault zone is small enough so as to seal the hydrocarbon column. The bigger the sealing potential of fault zone, the better the fault sealing is. The faulted zones sealing potential of Ying 32 fault, Ying 1 fault block in Dongxin oilfield gradually decreased from north to south as well as from Es21 to Es211 . It reflected that fault sealing of Ying 32 fault are better in the north than in the south and better in the upper layers than in the lower layers. All those expressed sealing difference and dynamic characteristics for the same fault.